Samsung C Pen
I've been looking for an option with a fine tip myself and noticed that Samsung offered a C Pen for the Galaxy S3. Well, I decided to get it and try it on my Tab S 8.4. I can say that it works well on the screen straight up, meaning no screen protector. I added an Illumishield Blue Light screen protector on it and it works but not quite as well as without. There seems to bee a little bit of "sticking" instead of gliding smoothly across the screen. This is of course the screen protectors issue and not the pen. I will swap it out once there is a tempered glass version available.
I can use it as a pointer and tap to launch and do things. In S Note, it works very well. I'd even say it works better in S Note than it does in Evernote at this point.
I think this is going to work out well. After all, it does have just a 3mm tip so you can see what you're actually doing and it's not nearly as expensive as most styli that are available.